61541142144497 has 2 divisors, whose sum is σ = 61541142144498. Its totient is φ = 61541142144496.

The previous prime is 61541142144457. The next prime is 61541142144617. The reversal of 61541142144497 is 79444124114516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58380128394721 + 3161013749776 = 7640689^2 + 1777924^2 .

It is a cyclic number.

It is not a de Polignac number, because 61541142144497 - 2⁸ = 61541142144241 is a prime.

It is not a weakly prime, because it can be changed into another prime (61541142144457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770571072248 + 30770571072249.

It is an arithmetic number, because the mean of its divisors is an integer number (30770571072249).

Almost surely, 2^{61541142144497} is an apocalyptic number.

It is an amenable number.

61541142144497 is a deficient number, since it is larger than the sum of its proper divisors (1).

61541142144497 is an equidigital number, since it uses as much as digits as its factorization.

61541142144497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 53.

The spelling of 61541142144497 in words is "sixty-one trillion, five hundred forty-one billion, one hundred forty-two million, one hundred forty-four thousand, four hundred ninety-seven".